webcit/webcit.c

   1 /*
   2  * $Id$
   3  *
   4  * This is the main transaction loop of the web service.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8 #define SHOW_ME_VAPPEND_PRINTF
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11 #include "webcit.h"
  12 #include "groupdav.h"
  13 #include "webserver.h"
  14
  15
  16 /*
  17  * String to unset the cookie.
  18  * Any date "in the past" will work, so I chose my birthday, right down to
  19  * the exact minute.  :)
  20  */
  21 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  22
  23 HashList *HandlerHash = NULL;
  24
  25 void WebcitAddUrlHandler(const char * UrlString,
  26                          long UrlSLen,
  27                          WebcitHandlerFunc F,
  28                          long Flags)
  29 {
  30         WebcitHandler *NewHandler;
  31
  32         if (HandlerHash == NULL)
  33                 HandlerHash = NewHash(1, NULL);
  34
  35         NewHandler = (WebcitHandler*) malloc(sizeof(WebcitHandler));
  36         NewHandler->F = F;
  37         NewHandler->Flags = Flags;
  38         Put(HandlerHash, UrlString, UrlSLen, NewHandler, NULL);
  39 }
  40
  41
  42 /*
  43  * web-printing funcion. uses our vsnprintf wrapper
  44  */
  45 void wprintf(const char *format,...)
  46 {
  47         wcsession *WCC = WC;
  48         va_list arg_ptr;
  49
  50         if (WCC->WBuf == NULL)
  51                 WCC->WBuf = NewStrBuf();
  52
  53         va_start(arg_ptr, format);
  54         StrBufVAppendPrintf(WCC->WBuf, format, arg_ptr);
  55         va_end(arg_ptr);
  56 }
  57
  58 /*
  59  * http-header-printing funcion. uses our vsnprintf wrapper
  60  */
  61 void hprintf(const char *format,...)
  62 {
  63         wcsession *WCC = WC;
  64         va_list arg_ptr;
  65
  66         va_start(arg_ptr, format);
  67         StrBufVAppendPrintf(WCC->HBuf, format, arg_ptr);
  68         va_end(arg_ptr);
  69 }
  70
  71
  72
  73 /*
  74  * wrap up an HTTP session, closes tags, etc.
  75  *
  76  * print_standard_html_footer should be set to:
  77  * 0            - to transmit only,
  78  * nonzero      - to append the closing tags
  79  */
  80 void wDumpContent(int print_standard_html_footer)
  81 {
  82         if (print_standard_html_footer) {
  83                 wprintf("</div> <!-- end of 'content' div -->\n");
  84                 do_template("trailing", NULL);
  85         }
  86
  87         /* If we've been saving it all up for one big output burst,
  88          * go ahead and do that now.
  89          */
  90         end_burst();
  91 }
  92
  93
  94
  95
  96 /*
  97  * Output HTTP headers and leading HTML for a page
  98  */
  99 void output_headers(    int do_httpheaders,     /* 1 = output HTTP headers                          */
 100                         int do_htmlhead,        /* 1 = output HTML <head> section and <body> opener */
 101
 102                         int do_room_banner,     /* 0=no, 1=yes,
 103                                                  * 2 = I'm going to embed my own, so don't open the
 104                                                  *     <div id="content"> either.
 105                                                  */
 106
 107                         int unset_cookies,      /* 1 = session is terminating, so unset the cookies */
 108                         int suppress_check,     /* 1 = suppress check for instant messages          */
 109                         int cache               /* 1 = allow browser to cache this page             */
 110 ) {
 111         char cookie[1024];
 112         char httpnow[128];
 113
 114         hprintf("HTTP/1.1 200 OK\n");
 115         http_datestring(httpnow, sizeof httpnow, time(NULL));
 116
 117         if (do_httpheaders) {
 118                 hprintf("Content-type: text/html; charset=utf-8\r\n"
 119                         "Server: %s / %s\n"
 120                         "Connection: close\r\n",
 121                         PACKAGE_STRING,
 122                         ChrPtr(serv_info.serv_software)
 123                 );
 124         }
 125
 126         if (cache) {
 127                 char httpTomorow[128];
 128
 129                 http_datestring(httpTomorow, sizeof httpTomorow,
 130                                 time(NULL) + 60 * 60 * 24 * 2);
 131
 132                 hprintf("Pragma: public\r\n"
 133                         "Cache-Control: max-age=3600, must-revalidate\r\n"
 134                         "Last-modified: %s\r\n"
 135                         "Expires: %s\r\n",
 136                         httpnow,
 137                         httpTomorow
 138                 );
 139         }
 140         else {
 141                 hprintf("Pragma: no-cache\r\n"
 142                         "Cache-Control: no-store\r\n"
 143                         "Expires: -1\r\n"
 144                 );
 145         }
 146
 147         stuff_to_cookie(cookie, 1024,
 148                         WC->wc_session, WC->wc_username,
 149                         WC->wc_password, WC->wc_roomname);
 150
 151         if (unset_cookies) {
 152                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
 153         } else {
 154                 hprintf("Set-cookie: webcit=%s; path=/\r\n", cookie);
 155                 if (server_cookie != NULL) {
 156                         hprintf("%s\n", server_cookie);
 157                 }
 158         }
 159
 160         if (do_htmlhead) {
 161                 begin_burst();
 162                 do_template("head", NULL);
 163
 164                 /* check for ImportantMessages (these display in a div overlaying the main screen) */
 165                 if (!IsEmptyStr(WC->ImportantMessage)) {
 166                         wprintf("<div id=\"important_message\">\n"
 167                                 "<span class=\"imsg\">");
 168                         escputs(WC->ImportantMessage);
 169                         wprintf("</span><br />\n"
 170                                 "</div>\n"
 171                                 "<script type=\"text/javascript\">\n"
 172                                 "        setTimeout('hide_imsg_popup()', 5000); \n"
 173                                 "</script>\n");
 174                         WC->ImportantMessage[0] = 0;
 175                 }
 176
 177                 if ( (WC->logged_in) && (!unset_cookies) ) {
 178                         DoTemplate(HKEY("iconbar"), NULL, &NoCtx);
 179                         page_popup();
 180                 }
 181
 182                 if (do_room_banner == 1) {
 183                         wprintf("<div id=\"banner\">\n");
 184                         embed_room_banner(NULL, navbar_default);
 185                         wprintf("</div>\n");
 186                 }
 187         }
 188
 189         if (do_room_banner == 1) {
 190                 wprintf("<div id=\"content\">\n");
 191         }
 192 }
 193
 194 void output_custom_content_header(const char *ctype) {
 195   hprintf("HTTP/1.1 200 OK\r\n");
 196   hprintf("Content-type: %s; charset=utf-8\r\n",ctype);
 197   hprintf("Server: %s / %s\r\n", PACKAGE_STRING, ChrPtr(serv_info.serv_software));
 198   hprintf("Connection: close\r\n");
 199 }
 200
 201
 202 /*
 203  * Generic function to do an HTTP redirect.  Easy and fun.
 204  */
 205 void http_redirect(const char *whichpage) {
 206         hprintf("HTTP/1.1 302 Moved Temporarily\n");
 207         hprintf("Location: %s\r\n", whichpage);
 208         hprintf("URI: %s\r\n", whichpage);
 209         hprintf("Content-type: text/html; charset=utf-8\r\n");
 210         wprintf("<html><body>");
 211         wprintf("Go <a href=\"%s\">here</A>.", whichpage);
 212         wprintf("</body></html>\n");
 213         end_burst();
 214 }
 215
 216
 217
 218 /*
 219  * Output a piece of content to the web browser using conformant HTTP and MIME semantics
 220  */
 221 void http_transmit_thing(const char *content_type,
 222                          int is_static) {
 223
 224 #ifndef TECH_PREVIEW
 225         lprintf(9, "http_transmit_thing(%s)%s\n",
 226                 content_type,
 227                 (is_static ? " (static)" : "")
 228         );
 229 #endif
 230         output_headers(0, 0, 0, 0, 0, is_static);
 231
 232         hprintf("Content-type: %s\r\n"
 233                 "Server: %s\r\n"
 234                 "Connection: close\r\n",
 235                 content_type,
 236                 PACKAGE_STRING);
 237
 238         end_burst();
 239 }
 240
 241 /*
 242  * print menu box like used in the floor view or admin interface.
 243  * This function takes pair of strings as va_args,
 244  * Title        Title string of the box
 245  * Class        CSS Class for the box
 246  * nLines       How many string pairs should we print? (URL, UrlText)
 247  * ...          Pairs of URL Strings and their Names
 248  */
 249 void print_menu_box(char* Title, char *Class, int nLines, ...)
 250 {
 251         va_list arg_list;
 252         long i;
 253
 254         svput("BOXTITLE", WCS_STRING, Title);
 255         do_template("beginboxx", NULL);
 256
 257         wprintf("<ul class=\"%s\">", Class);
 258
 259         va_start(arg_list, nLines);
 260         for (i = 0; i < nLines; ++i)
 261         {
 262                 wprintf("<li><a href=\"%s\">", va_arg(arg_list, char *));
 263                 wprintf((char *) va_arg(arg_list, char *));
 264                 wprintf("</a></li>\n");
 265         }
 266         va_end (arg_list);
 267
 268         wprintf("</a></li>\n");
 269
 270         wprintf("</ul>");
 271
 272         do_template("endbox", NULL);
 273 }
 274
 275
 276 /*
 277  * dump out static pages from disk
 278  */
 279 void output_static(char *what)
 280 {
 281         int fd;
 282         struct stat statbuf;
 283         off_t bytes;
 284         off_t count = 0;
 285         const char *content_type;
 286         int len;
 287         const char *Err;
 288
 289         fd = open(what, O_RDONLY);
 290         if (fd <= 0) {
 291                 lprintf(9, "output_static('%s')  -- NOT FOUND --\n", what);
 292                 hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 293                 hprintf("Content-Type: text/plain\r\n");
 294                 wprintf("Cannot open %s: %s\r\n", what, strerror(errno));
 295                 end_burst();
 296         } else {
 297                 len = strlen (what);
 298                 content_type = GuessMimeByFilename(what, len);
 299
 300                 if (fstat(fd, &statbuf) == -1) {
 301                         lprintf(9, "output_static('%s')  -- FSTAT FAILED --\n", what);
 302                         hprintf("HTTP/1.1 404 %s\r\n", strerror(errno));
 303                         hprintf("Content-Type: text/plain\r\n");
 304                         wprintf("Cannot fstat %s: %s\n", what, strerror(errno));
 305                         end_burst();
 306                         return;
 307                 }
 308
 309                 count = 0;
 310                 bytes = statbuf.st_size;
 311
 312                 if (StrBufReadBLOB(WC->WBuf, &fd, 1, bytes, &Err) < 0)
 313                 {
 314                         if (fd > 0) close(fd);
 315                         lprintf(9, "output_static('%s')  -- FREAD FAILED (%s) --\n", what, strerror(errno));
 316                                 hprintf("HTTP/1.1 500 internal server error \r\n");
 317                                 hprintf("Content-Type: text/plain\r\n");
 318                                 end_burst();
 319                                 return;
 320                 }
 321
 322
 323                 close(fd);
 324 #ifndef TECH_PREVIEW
 325                 lprintf(9, "output_static('%s')  %s\n", what, content_type);
 326 #endif
 327                 http_transmit_thing(content_type, 1);
 328         }
 329         if (yesbstr("force_close_session")) {
 330                 end_webcit_session();
 331         }
 332 }
 333
 334
 335 /*
 336  * Convenience functions to display a page containing only a string
 337  *
 338  * titlebarcolor        color of the titlebar of the frame
 339  * titlebarmsg          text to display in the title bar
 340  * messagetext          body of the box
 341  */
 342 void convenience_page(char *titlebarcolor, char *titlebarmsg, char *messagetext)
 343 {
 344         hprintf("HTTP/1.1 200 OK\n");
 345         output_headers(1, 1, 2, 0, 0, 0);
 346         wprintf("<div id=\"banner\">\n");
 347         wprintf("<table width=100%% border=0 bgcolor=\"#%s\"><tr><td>", titlebarcolor);
 348         wprintf("<span class=\"titlebar\">%s</span>\n", titlebarmsg);
 349         wprintf("</td></tr></table>\n");
 350         wprintf("</div>\n<div id=\"content\">\n");
 351         escputs(messagetext);
 352
 353         wprintf("<hr />\n");
 354         wDumpContent(1);
 355 }
 356
 357
 358 /*
 359  * Display a blank page.
 360  */
 361 void blank_page(void) {
 362         output_headers(1, 1, 0, 0, 0, 0);
 363         wDumpContent(2);
 364 }
 365
 366
 367 /*
 368  * A template has been requested
 369  */
 370 void url_do_template(void) {
 371         const StrBuf *Tmpl = sbstr("template");
 372         begin_burst();
 373         output_headers(1, 0, 0, 0, 1, 0);
 374         DoTemplate(SKEY(Tmpl), NULL, &NoCtx);
 375         end_burst();
 376 }
 377
 378
 379
 380 /*
 381  * convenience function to indicate success
 382  */
 383 void display_success(char *successmessage)
 384 {
 385         convenience_page("007700", "OK", successmessage);
 386 }
 387
 388
 389 /*
 390  * Authorization required page
 391  * This is probably temporary and should be revisited
 392  */
 393 void authorization_required(const char *message)
 394 {
 395         hprintf("HTTP/1.1 401 Authorization Required\r\n");
 396         hprintf("WWW-Authenticate: Basic realm=\"%s\"\r\n", ChrPtr(serv_info.serv_humannode));
 397         hprintf("Content-Type: text/html\r\n");
 398         wprintf("<h1>");
 399         wprintf(_("Authorization Required"));
 400         wprintf("</h1>\r\n");
 401         wprintf(_("The resource you requested requires a valid username and password. "
 402                 "You could not be logged in: %s\n"), message);
 403         wDumpContent(0);
 404
 405 }
 406
 407 /*
 408  * Convenience functions to wrap around asynchronous ajax responses
 409  */
 410 void begin_ajax_response(void) {
 411         wcsession *WCC = WC;
 412
 413         FlushStrBuf(WCC->HBuf);
 414         output_headers(0, 0, 0, 0, 0, 0);
 415
 416         hprintf("Content-type: text/html; charset=UTF-8\r\n"
 417                 "Server: %s\r\n"
 418                 "Connection: close\r\n"
 419                 ,
 420                 PACKAGE_STRING);
 421         begin_burst();
 422 }
 423
 424 /*
 425  * print ajax response footer
 426  */
 427 void end_ajax_response(void) {
 428         wDumpContent(0);
 429 }
 430
 431 /*
 432  * Wraps a Citadel server command in an AJAX transaction.
 433  */
 434 void ajax_servcmd(void)
 435 {
 436         char buf[1024];
 437         char gcontent[1024];
 438         char *junk;
 439         size_t len;
 440
 441         begin_ajax_response();
 442
 443         serv_printf("%s", bstr("g_cmd"));
 444         serv_getln(buf, sizeof buf);
 445         wprintf("%s\n", buf);
 446
 447         if (buf[0] == '8') {
 448                 serv_printf("\n\n000");
 449         }
 450         if ((buf[0] == '1') || (buf[0] == '8')) {
 451                 while (serv_getln(gcontent, sizeof gcontent), strcmp(gcontent, "000")) {
 452                         wprintf("%s\n", gcontent);
 453                 }
 454                 wprintf("000");
 455         }
 456         if (buf[0] == '4') {
 457                 text_to_server(bstr("g_input"));
 458                 serv_puts("000");
 459         }
 460         if (buf[0] == '6') {
 461                 len = atol(&buf[4]);
 462                 junk = malloc(len);
 463                 serv_read(junk, len);
 464                 free(junk);
 465         }
 466         if (buf[0] == '7') {
 467                 len = atol(&buf[4]);
 468                 junk = malloc(len);
 469                 memset(junk, 0, len);
 470                 serv_write(junk, len);
 471                 free(junk);
 472         }
 473
 474         end_ajax_response();
 475
 476         /*
 477          * This is kind of an ugly hack, but this is the only place it can go.
 478          * If the command was GEXP, then the instant messenger window must be
 479          * running, so reset the "last_pager_check" watchdog timer so
 480          * that page_popup() doesn't try to open it a second time.
 481          */
 482         if (!strncasecmp(bstr("g_cmd"), "GEXP", 4)) {
 483                 WC->last_pager_check = time(NULL);
 484         }
 485 }
 486
 487
 488 /*
 489  * Helper function for the asynchronous check to see if we need
 490  * to open the instant messenger window.
 491  */
 492 void seconds_since_last_gexp(void)
 493 {
 494         char buf[256];
 495
 496         if ( (time(NULL) - WC->last_pager_check) < 30) {
 497                 wprintf("NO\n");
 498         }
 499         else {
 500                 memset(buf, 0, 5);
 501                 serv_puts("NOOP");
 502                 serv_getln(buf, sizeof buf);
 503                 if (buf[3] == '*') {
 504                         wprintf("YES");
 505                 }
 506                 else {
 507                         wprintf("NO");
 508                 }
 509         }
 510 }
 511
 512 /**
 513  * \brief Detects a 'mobile' user agent
 514  */
 515 int is_mobile_ua(char *user_agent) {
 516       if (strstr(user_agent,"iPhone OS") != NULL) {
 517         return 1;
 518       } else if (strstr(user_agent,"Windows CE") != NULL) {
 519         return 1;
 520       } else if (strstr(user_agent,"SymbianOS") != NULL) {
 521         return 1;
 522       } else if (strstr(user_agent, "Opera Mobi") != NULL) {
 523         return 1;
 524       } else if (strstr(user_agent, "Firefox/2.0.0 Opera 9.51 Beta") != NULL) {
 525               /*  For some reason a new install of Opera 9.51beta decided to spoof. */
 526           return 1;
 527           }
 528       return 0;
 529 }
 530
 531
 532 /*
 533  * Entry point for WebCit transaction
 534  */
 535 void session_loop(HashList *HTTPHeaders, StrBuf *ReqLine, StrBuf *request_method, StrBuf *ReadBuf)
 536 {
 537         StrBuf *Buf;
 538         const char *pch, *pchs, *pche;
 539         void *vLine;
 540         char action[1024];
 541         char arg[8][128];
 542         size_t sizes[10];
 543         char *index[10];
 544         char buf[SIZ];
 545         int a, nBackDots, nEmpty;
 546         int ContentLength = 0;
 547         StrBuf *ContentType = NULL;
 548         StrBuf *UrlLine = NULL;
 549         StrBuf *content = NULL;
 550         const char *content_end = NULL;
 551         StrBuf *browser_host = NULL;
 552         char user_agent[256];
 553         int body_start = 0;
 554         int is_static = 0;
 555         int n_static = 0;
 556         int len = 0;
 557         void *vHandler;
 558         WebcitHandler *Handler;
 559
 560         /*
 561          * We stuff these with the values coming from the client cookies,
 562          * so we can use them to reconnect a timed out session if we have to.
 563          */
 564         StrBuf *c_username;
 565         StrBuf *c_password;
 566         StrBuf *c_roomname;
 567         char c_httpauth_string[SIZ];
 568         StrBuf *c_httpauth_user;
 569         StrBuf *c_httpauth_pass;
 570         wcsession *WCC;
 571
 572         Buf = NewStrBuf();
 573         c_username = NewStrBuf();
 574         c_password = NewStrBuf();
 575         c_roomname = NewStrBuf();
 576         safestrncpy(c_httpauth_string, "", sizeof c_httpauth_string);
 577         c_httpauth_user = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_USER));
 578         c_httpauth_pass = NewStrBufPlain(HKEY(DEFAULT_HTTPAUTH_PASS));
 579
 580         WCC= WC;
 581         if (WCC->WBuf == NULL)
 582                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 583         FlushStrBuf(WCC->WBuf);
 584
 585         if (WCC->HBuf == NULL)
 586                 WCC->HBuf = NewStrBuf();
 587         FlushStrBuf(WCC->HBuf);
 588
 589         WCC->upload_length = 0;
 590         WCC->upload = NULL;
 591         WCC->is_mobile = 0;
 592         WCC->trailing_javascript = NewStrBuf();
 593
 594         /** Figure out the action */
 595         index[0] = action;
 596         sizes[0] = sizeof action;
 597         for (a=1; a<9; a++)
 598         {
 599                 index[a] = arg[a-1];
 600                 sizes[a] = sizeof arg[a-1];
 601         }
 602 /*///   index[9] = &foo; todo */
 603         nBackDots = 0;
 604         nEmpty = 0;
 605         for ( a = 0; a < 9; ++a)
 606         {
 607                 extract_token(index[a], ChrPtr(ReqLine), a + 1, '/', sizes[a]);
 608                 if (strstr(index[a], "?")) *strstr(index[a], "?") = 0;
 609                 if (strstr(index[a], "&")) *strstr(index[a], "&") = 0;
 610                 if (strstr(index[a], " ")) *strstr(index[a], " ") = 0;
 611                 if ((index[a][0] == '.') && (index[a][1] == '.'))
 612                         nBackDots++;
 613                 if (index[a][0] == '\0')
 614                         nEmpty++;
 615         }
 616
 617
 618         if (GetHash(HTTPHeaders, HKEY("COOKIE"), &vLine) &&
 619             (vLine != NULL)){
 620                 cookie_to_stuff((StrBuf *)vLine, NULL,
 621                                 c_username,
 622                                 c_password,
 623                                 c_roomname);
 624         }
 625         if (GetHash(HTTPHeaders, HKEY("AUTHORIZATION"), &vLine) &&
 626             (vLine!=NULL)) {
 627 /* TODO: wrap base64 in strbuf */
 628                 CtdlDecodeBase64(c_httpauth_string, ChrPtr((StrBuf*)vLine), StrLength((StrBuf*)vLine));
 629                 FlushStrBuf(Buf);
 630                 StrBufAppendBufPlain(Buf, c_httpauth_string, -1, 0);
 631                 StrBufExtract_token(c_httpauth_user, Buf, 0, ':');
 632                 StrBufExtract_token(c_httpauth_pass, Buf, 1, ':');
 633         }
 634         if (GetHash(HTTPHeaders, HKEY("CONTENT-LENGTH"), &vLine) &&
 635             (vLine!=NULL)) {
 636                 ContentLength = StrToi((StrBuf*)vLine);
 637         }
 638         if (GetHash(HTTPHeaders, HKEY("CONTENT-TYPE"), &vLine) &&
 639             (vLine!=NULL)) {
 640                 ContentType = (StrBuf*)vLine;
 641         }
 642         if (GetHash(HTTPHeaders, HKEY("USER-AGENT"), &vLine) &&
 643             (vLine!=NULL)) {
 644                 safestrncpy(user_agent, ChrPtr((StrBuf*)vLine), sizeof user_agent);
 645 #ifdef TECH_PREVIEW
 646                 if ((WCC->is_mobile < 0) && is_mobile_ua(&buf[12])) {
 647                         WCC->is_mobile = 1;
 648                 }
 649                 else {
 650                         WCC->is_mobile = 0;
 651                 }
 652 #endif
 653         }
 654         if ((follow_xff) &&
 655             GetHash(HTTPHeaders, HKEY("X-FORWARDED-HOST"), &vLine) &&
 656             (vLine != NULL)) {
 657                 WCC->http_host = (StrBuf*)vLine;
 658         }
 659         if ((StrLength(WCC->http_host) == 0) &&
 660             GetHash(HTTPHeaders, HKEY("HOST"), &vLine) &&
 661             (vLine!=NULL)) {
 662                 WCC->http_host = (StrBuf*)vLine;
 663         }
 664
 665         if (GetHash(HTTPHeaders, HKEY("X-FORWARDED-FOR"), &vLine) &&
 666             (vLine!=NULL)) {
 667                 browser_host = (StrBuf*) vLine;
 668
 669                 while (StrBufNum_tokens(browser_host, ',') > 1) {
 670                         StrBufRemove_token(browser_host, 0, ',');
 671                 }
 672                 StrBufTrim(browser_host);
 673         }
 674
 675         if (ContentLength > 0) {
 676                 content = NewStrBuf();
 677                 StrBufPrintf(content, "Content-type: %s\n"
 678                          "Content-length: %d\n\n",
 679                          ChrPtr(ContentType), ContentLength);
 680 /*
 681                 hprintf("Content-type: %s\n"
 682                         "Content-length: %d\n\n",
 683                         ContentType, ContentLength);
 684 */
 685                 body_start = StrLength(content);
 686
 687                 /** Read the entire input data at once. */
 688                 client_read(&WCC->http_sock, content, ReadBuf, ContentLength + body_start);
 689
 690                 if (!strncasecmp(ChrPtr(ContentType), "application/x-www-form-urlencoded", 33)) {
 691                         StrBufCutLeft(content, body_start);
 692                         ParseURLParams(content);
 693                 } else if (!strncasecmp(ChrPtr(ContentType), "multipart", 9)) {
 694                         content_end = ChrPtr(content) + ContentLength + body_start;
 695                         mime_parser(ChrPtr(content), content_end, *upload_handler, NULL, NULL, NULL, 0);
 696                 }
 697         } else {
 698                 content = NULL;
 699         }
 700
 701         /* make a note of where we are in case the user wants to save it */
 702         WCC->this_page = NewStrBufDup(ReqLine);
 703         StrBufRemove_token(WCC->this_page, 2, ' ');
 704         StrBufRemove_token(WCC->this_page, 0, ' ');
 705
 706         /* If there are variables in the URL, we must grab them now */
 707         UrlLine = NewStrBufDup(ReqLine);
 708         len = StrLength(UrlLine);
 709         pch = pchs = ChrPtr(UrlLine);
 710         pche = pchs + len;
 711         while (pch < pche) {
 712                 if ((*pch == '?') || (*pch == '&')) {
 713                         StrBufCutLeft(UrlLine, pch - pchs + 1);
 714                         ParseURLParams(UrlLine);
 715                         break;
 716                 }
 717                 pch ++;
 718         }
 719         FreeStrBuf(&UrlLine);
 720
 721         /* If it's a "force 404" situation then display the error and bail. */
 722         if (!strcmp(action, "404")) {
 723                 hprintf("HTTP/1.1 404 Not found\r\n");
 724                 hprintf("Content-Type: text/plain\r\n");
 725                 wprintf("Not found\r\n");
 726                 end_burst();
 727                 goto SKIP_ALL_THIS_CRAP;
 728         }
 729
 730         /* Static content can be sent without connecting to Citadel. */
 731         is_static = 0;
 732         for (a=0; a<ndirs && ! is_static; ++a) {
 733                 if (!strcasecmp(action, (char*)static_content_dirs[a])) { /* map web to disk location */
 734                         is_static = 1;
 735                         n_static = a;
 736                 }
 737         }
 738         if (is_static) {
 739                 if (nBackDots < 2)
 740                 {
 741                         snprintf(buf, sizeof buf, "%s/%s/%s/%s/%s/%s/%s/%s",
 742                                  static_dirs[n_static],
 743                                  index[1], index[2], index[3], index[4], index[5], index[6], index[7]);
 744                         for (a=0; a<8; ++a) {
 745                                 if (buf[strlen(buf)-1] == '/') {
 746                                         buf[strlen(buf)-1] = 0;
 747                                 }
 748                         }
 749                         for (a = 0; a < strlen(buf); ++a) {
 750                                 if (isspace(buf[a])) {
 751                                         buf[a] = 0;
 752                                 }
 753                         }
 754                         output_static(buf);
 755                 }
 756                 else
 757                 {
 758                         lprintf(9, "Suspicious request. Ignoring.");
 759                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 760                         hprintf("Content-Type: text/plain\r\n\r\n");
 761                         wprintf("You have sent a malformed or invalid request.\r\n");
 762                         end_burst();
 763                 }
 764                 goto SKIP_ALL_THIS_CRAP;        /* Don't try to connect */
 765         }
 766
 767         /* If the client sent a nonce that is incorrect, kill the request. */
 768         if (strlen(bstr("nonce")) > 0) {
 769                 lprintf(9, "Comparing supplied nonce %s to session nonce %ld\n",
 770                         bstr("nonce"), WCC->nonce);
 771                 if (ibstr("nonce") != WCC->nonce) {
 772                         lprintf(9, "Ignoring request with mismatched nonce.\n");
 773                         hprintf("HTTP/1.1 404 Security check failed\r\n");
 774                         hprintf("Content-Type: text/plain\r\n\r\n");
 775                         wprintf("Security check failed.\r\n");
 776                         end_burst();
 777                         goto SKIP_ALL_THIS_CRAP;
 778                 }
 779         }
 780
 781         /*
 782          * If we're not connected to a Citadel server, try to hook up the
 783          * connection now.
 784          */
 785         if (!WCC->connected) {
 786                 if (!strcasecmp(ctdlhost, "uds")) {
 787                         /* unix domain socket */
 788                         snprintf(buf, SIZ, "%s/citadel.socket", ctdlport);
 789                         WCC->serv_sock = uds_connectsock(buf);
 790                 }
 791                 else {
 792                         /* tcp socket */
 793                         WCC->serv_sock = tcp_connectsock(ctdlhost, ctdlport);
 794                 }
 795
 796                 if (WCC->serv_sock < 0) {
 797                         do_logout();
 798                         goto SKIP_ALL_THIS_CRAP;
 799                 }
 800                 else {
 801                         WCC->connected = 1;
 802                         serv_getln(buf, sizeof buf);    /* get the server greeting */
 803
 804                         /* Are there too many users already logged in? */
 805                         if (!strncmp(buf, "571", 3)) {
 806                                 wprintf(_("This server is already serving its maximum number of users and cannot accept any additional logins at this time.  Please try again later or contact your system administrator."));
 807                                 end_burst();
 808                                 end_webcit_session();
 809                                 goto SKIP_ALL_THIS_CRAP;
 810                         }
 811
 812                         /*
 813                          * From what host is our user connecting?  Go with
 814                          * the host at the other end of the HTTP socket,
 815                          * unless we are following X-Forwarded-For: headers
 816                          * and such a header has already turned up something.
 817                          */
 818                         if ( (!follow_xff) || (StrLength(browser_host) == 0) ) {
 819                                 if (browser_host == NULL) {
 820                                         browser_host = NewStrBuf();
 821                                         Put(HTTPHeaders, HKEY("FreeMeWithTheOtherHeaders"),
 822                                             browser_host, HFreeStrBuf);
 823                                 }
 824                                 locate_host(browser_host, WCC->http_sock);
 825                         }
 826
 827                         get_serv_info(browser_host, user_agent);
 828                         if (serv_info.serv_rev_level < MINIMUM_CIT_VERSION) {
 829                                 begin_burst();
 830                                 wprintf(_("You are connected to a Citadel "
 831                                         "server running Citadel %d.%02d. \n"
 832                                         "In order to run this version of WebCit "
 833                                         "you must also have Citadel %d.%02d or"
 834                                         " newer.\n\n\n"),
 835                                                 serv_info.serv_rev_level / 100,
 836                                                 serv_info.serv_rev_level % 100,
 837                                                 MINIMUM_CIT_VERSION / 100,
 838                                                 MINIMUM_CIT_VERSION % 100
 839                                         );
 840                                 end_burst();
 841                                 end_webcit_session();
 842                                 goto SKIP_ALL_THIS_CRAP;
 843                         }
 844                 }
 845         }
 846 /*///////todo: restore language in this case */
 847         /*
 848          * Functions which can be performed without logging in
 849          */
 850         if (!strcasecmp(action, "listsub")) {
 851                 do_listsub();
 852                 goto SKIP_ALL_THIS_CRAP;
 853         }
 854         if (!strcasecmp(action, "freebusy")) {
 855                 do_freebusy(ChrPtr(ReqLine));
 856                 goto SKIP_ALL_THIS_CRAP;
 857         }
 858
 859         /*
 860          * If we're not logged in, but we have HTTP Authentication data,
 861          * try logging in to Citadel using that.
 862          */
 863         if ((!WCC->logged_in)
 864             && (StrLength(c_httpauth_user) > 0)
 865             && (StrLength(c_httpauth_pass) > 0))
 866         {
 867                 FlushStrBuf(Buf);
 868                 serv_printf("USER %s", ChrPtr(c_httpauth_user));
 869                 StrBuf_ServGetln(Buf);
 870                 if (GetServerStatus(Buf, NULL) == 3) {
 871                         serv_printf("PASS %s", ChrPtr(c_httpauth_pass));
 872                         StrBuf_ServGetln(Buf);
 873                         if (GetServerStatus(Buf, NULL) == 2) {
 874                                 become_logged_in(c_httpauth_user,
 875                                                 c_httpauth_pass, Buf);
 876                                 if (WCC->httpauth_user == NULL)
 877                                         WCC->httpauth_user = NewStrBufDup(c_httpauth_user);
 878                                 else {
 879                                         FlushStrBuf(WCC->httpauth_user);
 880                                         StrBufAppendBuf(WCC->httpauth_user, c_httpauth_user, 0);
 881                                 }
 882                                 if (WCC->httpauth_pass == NULL)
 883                                         WCC->httpauth_pass = NewStrBufDup(c_httpauth_pass);
 884                                 else {
 885                                         FlushStrBuf(WCC->httpauth_pass);
 886                                         StrBufAppendBuf(WCC->httpauth_pass, c_httpauth_pass, 0);
 887                                 }
 888                         } else {
 889                                 /* Should only display when password is wrong */
 890                                 authorization_required(&buf[4]);
 891                                 FreeStrBuf(&Buf);
 892                                 goto SKIP_ALL_THIS_CRAP;
 893                         }
 894                 }
 895         }
 896
 897         /* This needs to run early */
 898 #ifdef TECH_PREVIEW
 899         if (!strcasecmp(action, "rss")) {
 900                 display_rss(sbstr("room"), request_method);
 901                 goto SKIP_ALL_THIS_CRAP;
 902         }
 903 #endif
 904
 905         /*
 906          * The GroupDAV stuff relies on HTTP authentication instead of
 907          * our session's authentication.
 908          */
 909         if (!strncasecmp(action, "groupdav", 8)) {
 910                 groupdav_main(HTTPHeaders,
 911                               ReqLine, request_method,
 912                               ContentType, /* do GroupDAV methods */
 913                               ContentLength, content, body_start);
 914                 if (!WCC->logged_in) {
 915                         WCC->killthis = 1;      /* If not logged in, don't */
 916                 }                               /* keep the session active */
 917                 goto SKIP_ALL_THIS_CRAP;
 918         }
 919
 920
 921         /*
 922          * Automatically send requests with any method other than GET or
 923          * POST to the GroupDAV code as well.
 924          */
 925         if ((strcasecmp(ChrPtr(request_method), "GET")) && (strcasecmp(ChrPtr(request_method), "POST"))) {
 926                 groupdav_main(HTTPHeaders, ReqLine,
 927                               request_method, ContentType, /** do GroupDAV methods */
 928                               ContentLength, content, body_start);
 929                 if (!WCC->logged_in) {
 930                         WCC->killthis = 1;      /** If not logged in, don't */
 931                 }                               /** keep the session active */
 932                 goto SKIP_ALL_THIS_CRAP;
 933         }
 934
 935         /*
 936          * If we're not logged in, but we have username and password cookies
 937          * supplied by the browser, try using them to log in.
 938          */
 939         if ((!WCC->logged_in)
 940            && (StrLength(c_username)>0)
 941            && (StrLength(c_password)>0)) {
 942                 serv_printf("USER %s", ChrPtr(c_username));
 943                 StrBuf_ServGetln(Buf);
 944                 if (GetServerStatus(Buf, NULL) == 3) {
 945                         serv_printf("PASS %s", ChrPtr(c_password));
 946                         StrBuf_ServGetln(Buf);
 947                         if (GetServerStatus(Buf, NULL) == 2) {
 948                                 StrBuf *Lang;
 949                                 become_logged_in(c_username, c_password, Buf);
 950                                 if (get_preference("language", &Lang)) {
 951                                         set_selected_language(ChrPtr(Lang));
 952                                         go_selected_language();         /* set locale */
 953                                 }
 954                                 get_preference("default_header_charset", &WCC->DefaultCharset);
 955                         }
 956                 }
 957         }
 958
 959         /*
 960          * If a 'gotofirst' parameter has been specified, attempt to goto that room
 961          * prior to doing anything else.
 962          */
 963         if (havebstr("gotofirst")) {
 964                 gotoroom(sbstr("gotofirst"));   /* do this quietly to avoid session output! */
 965         }
 966
 967         /*
 968          * If we don't have a current room, but a cookie specifying the
 969          * current room is supplied, make an effort to go there.
 970          */
 971         if ((StrLength(WCC->wc_roomname) == 0) && (StrLength(c_roomname) > 0)) {
 972                 serv_printf("GOTO %s", ChrPtr(c_roomname));
 973                 StrBuf_ServGetln(Buf);
 974                 if (GetServerStatus(Buf, NULL) == 2) {
 975                         if (WCC->wc_roomname == NULL) {
 976                                 WCC->wc_roomname = NewStrBufDup(c_roomname);
 977                         }
 978                         else {
 979                                 FlushStrBuf(WCC->wc_roomname);
 980                                 StrBufAppendBuf(WCC->wc_roomname, c_roomname, 0);
 981                         }
 982                 }
 983         }
 984
 985         GetHash(HandlerHash, action, strlen(action) /* TODO*/, &vHandler),
 986                 Handler = (WebcitHandler*) vHandler;
 987         if (Handler != NULL) {
 988                 if (!WCC->logged_in && ((Handler->Flags & ANONYMOUS) == 0)) {
 989                         display_login(NULL);
 990                 }
 991                 else {
 992                         if((Handler->Flags & NEED_URL)) {
 993                                 if (WCC->UrlFragment1 == NULL)
 994                                         WCC->UrlFragment1 = NewStrBuf();
 995                                 if (WCC->UrlFragment2 == NULL)
 996                                         WCC->UrlFragment2 = NewStrBuf();
 997                                 if (WCC->UrlFragment3 == NULL)
 998                                         WCC->UrlFragment3 = NewStrBuf();
 999                                 StrBufPrintf(WCC->UrlFragment1, "%s", index[0]);
1000                                 StrBufPrintf(WCC->UrlFragment2, "%s", index[1]);
1001                                 StrBufPrintf(WCC->UrlFragment3, "%s", index[2]);
1002                         }
1003                         if ((Handler->Flags & AJAX) != 0)
1004                                 begin_ajax_response();
1005                         Handler->F();
1006                         if ((Handler->Flags & AJAX) != 0)
1007                                 end_ajax_response();
1008                 }
1009         }
1010         /* When all else fais, display the main menu. */
1011         else {
1012                 if (!WCC->logged_in)
1013                         display_login(NULL);
1014                 else
1015                         display_main_menu();
1016         }
1017
1018 SKIP_ALL_THIS_CRAP:
1019         if (WCC->SavePrefsToServer) {
1020                 save_preferences();
1021                 WCC->SavePrefsToServer = 0;
1022         }
1023         FreeStrBuf(&Buf);
1024         FreeStrBuf(&c_username);
1025         FreeStrBuf(&c_password);
1026         FreeStrBuf(&c_roomname);
1027         FreeStrBuf(&c_httpauth_user);
1028         FreeStrBuf(&c_httpauth_pass);
1029         FreeStrBuf(&WCC->this_page);
1030         fflush(stdout);
1031         if (content != NULL) {
1032                 FreeStrBuf(&content);
1033                 content = NULL;
1034         }
1035         DeleteHash(&WCC->urlstrings);
1036         if (WCC->upload_length > 0) {
1037                 free(WCC->upload);
1038                 WCC->upload_length = 0;
1039         }
1040         FreeStrBuf(&WCC->trailing_javascript);
1041 }
1042
1043
1044 /*
1045  * Replacement for sleep() that uses select() in order to avoid SIGALRM
1046  */
1047 void sleeeeeeeeeep(int seconds)
1048 {
1049         struct timeval tv;
1050
1051         tv.tv_sec = seconds;
1052         tv.tv_usec = 0;
1053         select(0, NULL, NULL, NULL, &tv);
1054 }
1055
1056
1057 int ConditionalImportantMesage(StrBuf *Target, WCTemplputParams *TP)
1058 {
1059         wcsession *WCC = WC;
1060         if (WCC != NULL)
1061                 return (!IsEmptyStr(WCC->ImportantMessage));
1062         else
1063                 return 0;
1064 }
1065
1066 void tmplput_importantmessage(StrBuf *Target, WCTemplputParams *TP)
1067 {
1068         wcsession *WCC = WC;
1069
1070         if (WCC != NULL) {
1071 /*
1072                 StrBufAppendTemplate(Target, nArgs, Tokens, Context, ContextType,
1073                                      WCC->ImportantMessage, 0);
1074 */
1075                 StrEscAppend(Target, NULL, WCC->ImportantMessage, 0, 0);
1076                 WCC->ImportantMessage[0] = '\0';
1077         }
1078 }
1079
1080 void tmplput_trailing_javascript(StrBuf *Target, WCTemplputParams *TP)
1081 {
1082         wcsession *WCC = WC;
1083
1084         if (WCC != NULL)
1085                 StrBufAppendTemplate(Target, TP, WCC->trailing_javascript, 0);
1086 }
1087
1088 void tmplput_csslocal(StrBuf *Target, WCTemplputParams *TP)
1089 {
1090         extern StrBuf *csslocal;
1091         StrBufAppendBuf(Target,
1092                         csslocal, 0);
1093 }
1094
1095
1096
1097
1098 void
1099 InitModule_WEBCIT
1100 (void)
1101 {
1102         WebcitAddUrlHandler(HKEY("blank"), blank_page, ANONYMOUS);
1103         WebcitAddUrlHandler(HKEY("do_template"), url_do_template, ANONYMOUS);
1104         WebcitAddUrlHandler(HKEY("sslg"), seconds_since_last_gexp, AJAX);
1105         WebcitAddUrlHandler(HKEY("ajax_servcmd"), ajax_servcmd, 0);
1106
1107         RegisterConditional(HKEY("COND:IMPMSG"), 0, ConditionalImportantMesage, CTX_NONE);
1108         RegisterNamespace("CSSLOCAL", 0, 0, tmplput_csslocal, CTX_NONE);
1109         RegisterNamespace("IMPORTANTMESSAGE", 0, 0, tmplput_importantmessage, CTX_NONE);
1110         RegisterNamespace("TRAILING_JAVASCRIPT", 0, 0, tmplput_trailing_javascript, CTX_NONE);
1111 }